Maybe the first step in learning how to not hate ourselves is in beginning to like ourselves? This is how a good change of diet works... adding the good stuff before we can eliminate the poorer foods?

Of course it won't happen all at once.

If we find even one thing about ourselves that we do well... NOT bad or poorly... and anyone reading/posting on site can claim THAT imo. We don't get to evaluate it or weigh it against the negative things we think of ourselves...

when someone tells us something positive about ourselves, we accept it at face value, no countering.

I think you can do this.